Sizing apparatus with free space above the separating system of obstacles

ABSTRACT

A sizing device, for classifying particles, comprises a frame which is substantially rhombic in side elevation or vertical longitudinal section, and carrying a number of screens, bars, or similar elements having openings larger than the arriving particles. Vibrating means are secured to the frame beneath the screens or the like and symetrically with respect to the shorter diagonal of the substantially rhombic frame, so that the space above the topmost screen is free and substantially unobstructed.

United States Patent 1191 Mogensen [111 3,710,940 1 51 Jan. 16,1973

541 SIZING APPARATUS WITH FREE SPACE ABOVE THE SEPARATING SYSTEM OFOBSTACLES [76] Inventor: Nils Peder Mogensen, Mjolnartorpsvagen 14,Djursholm, Sweden [22] Filed: May 22, 1969 [21] Appl. No.: 826,988

[30] Foreign Application Priority Data June 4, 1968 Sweden ..7473/68[52] US. Cl. ..209/3l5, 209/325, 209/412 [51] Int. Cl. ..B07b 1/28 [58]Field of Search ..209/315-, 316, 325, 353, 355, 209/ 17, 412

[56] References Cited UNITED STATES PATENTS 1,397,338 11/1921 Sturtevant..209/315 2,683,533 7/1954 Paul 2,853,191 9/1958 Mogensen ..209/3l56/1966 Mogenscn ..209/3 16 3,347,368 10/1967 Mogensen .209/99 3,468,4189/1969 Renner ..209/315 FOREIGN PATENTS oR' APPLlCATIONS 847,581 9/ l 956 Germany ..209/ l 7 1,441,632 5/1966 France 509/315 PrimaryExaminerFrank W. Lutter Assistant Examiner-Wi1liam Cuchlinski, Jr.Attorney-McGlew and Toren [5 7] ABSTRACT A sizing device, forclassifying particles, comprises a frame which is substantially rhom'bicin side elevation or vertical longitudinal section, and carrying anumber -of screens, bars, or similar elements having openings largerthan the arriving particles. Vibrating means are secured to the framebeneath the screens or the like and symetrically with respect to theshorter diagonal of the substantially rhombic frame, so that the spaceabove the topmost screen is free and substantially unobstructed.

3 Claims, 3 Drawing Figures PATENTEDJAN 16 I973 FIGZ FIG.I

INVENTOR. NIL 5 PE DE R M06 5N5 ATTORNE Y5 SIZING APPARATUS WITH FREESPACE ABOVE THE SEPARATING SYSTEM OF OBSTACLES The invention refers tosizing apparatuses of the dispersing type, i.e., where a collection ofparticles is introduced to a space where the particles are subjected tocollisions against, or forces from, obstacles such as screens, bars, orsimilar elements or means in such a manner that the particles arebrought out of their normal flow in a degree that corresponds to theparticle size, so that the bigger the particles are the higher is theirprobability of being removed. An apparatus operating according to thisprinciple is described in the U.S. Pat. No. 2,853,191.

Such sizing apparatuses have a series of such elements arranged oneabove the other, the opening in such element or system of elements beingwider than the largest particles arriving to it. One or more of thesesystems of elements can be replaced by a divergator, described in US.Pat. No. 3,347,368. The elements or systems of elements are mounted in aframe, usually vibrated by means of one or more vibrators.

All the known apparatuses of that kind have the vibrators mounted on thetop of the apparatus at the end opposite to the end where the materialto be sized is introduced into the apparatus. This is a considerabledisadvantage in several respects:

1. The space between the vibrators or their foundation and the topmostobstacles limits the maximum particle size of the material to be fed.

2. When the apparatus is treating hot material, the

vibrators are exposed to the heat mainly by radiation and convection ina very high degree.

3. The space above the obstacles is often required for purposes such asfeeding, presizing, transportation of presized material etc.

All these disadvantages are overcome in apparatuses according to thisnew invention.

BRIEF DESCRIPTION OF THE DRAWING An example of such an apparatus isdemonstrated on the drawing where FIG. 1 is a longitudinal sectionthrough the machine,

FIG. 2 is the machine seen from the rear end, and

FIG. 3 is a side view from the outside.

DESCRIPTION OF THE PREFERRED EMBODIMENT The apparatus consists of aframe 20, which is substantially rhombic in elevation or in alongitudinal vertical section, in which five screens 1, 3, 4, 5, 6 arearranged sloping from the feeding space 2 with successively increasinginclinations. The side walls are'reinforced by beams 16. The machine issuspended in eye bolts 11 by springs 10 secured to a suitable support.The machine is vibrated by a vibration means, such as two vibrators 19which are secured to side walls 21 of frame 20, these two vibratorsbeing secured to a transversal wall 15 fixed to side walls 21 of frame20. Vibrators 19 are symmetrically arranged in relation to the device.Wall 15 is substantially aligned with the shorter diagonal of thesubstantially rhombic frame 20, with the vibrators being positionedadjacent the lower end of such shorter diagonal and beneath thelowermost screen.

The material which is to be sized is fed into the space 2 at the upperrear end of the machine. The various fractions can be removed at theoutlet ends of each screen 1, 3, 4, 5, 6 and under the bottom screen 6.The vibrators are protected from the flow of material by a plate 14.

What is claimed is:

I. In a sizing device for classifying particles, of the type includingplural superposed and vertically spaced classifying elements spacedapart in such a way that, in any part of the device, the openingsbetween adjacent elements are larger than the particles arriving at suchpart, the improvement comprising, in combination, a frame, includingside walls, supporting said classifying elements and having asubstantially rhombic configuration in vertical longitudinal section;the space within said frame above the uppermost classifying elementbeing substantially clear of obstruction; a linear vibrator meansmounted within said frame beneath the lowermost classifying element;said vibrator means being positioned symmetrically with respect to theshorter diagonal of said substantially rhomic frame; a transversal wallsecured to the side walls of said frame perpendicularly to said sidewalls; said transversal wall extending substantially in the direction ofsaid shorter diagonal; said vibrator means including at least onevibrator mounted on said transversal wall.

2. In a sizing device, the improvement claimed in claim 1, in which saidvibrator means comprises at least one pair of vibrators, the vibratorsof each pair being mounted on respective opposite sides of saidtransversal wall.

3. In a sizing device, the improvement claimed in claim 2, in which saidvibrators are removable from said frame as a unit.

1. In a sizing device for classifying particles, of the type includingplural superposed and vertically spaced classifying elements spacedapart in such a way that, in any part of the device, the openingsbetween adjacent elements are larger than the particles arriving at suchpart, the improvement comprising, in combination, a frame, includingside walls, supporting said classifying elements and having asubstantially rhombic configuration in vertical longitudinal section;the space within said frame above the uppermost classifying elementbeing substantially clear of obstruction; a linear vibrator meansmounted within said frame beneath the lowermost classifying element;said vibrator means being positioned symmetrically with respect to theshorter diagonal of said substantially rhomic frame; a transversal wallsecured to the side walls of said frame perpendicularly to said sidewalls; said transversal wall extending substantially in the direction ofsaid shorter diagonal; said vibrator means including at least onevibrator mounted on said transversal wall.
 2. In a sizing device, theimprovement claimed in claim 1, in which said vibrator means comprisesat least one pair of vibrators, the vibrators of each pair being mountedon respective opposite sides of said transversal wall.
 3. In a sizingdevice, the improvement claimed in claim 2, in which said vibrators areremovable from said frame as a unit.